/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Sets the Blueprint edit-only flag on the variable with the specified name
static void SetBlueprintOnlyEditableFlag ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, const [FName](API\Runtime\Core\UObject\FName) & VarName, const bool bNewBlueprintOnly )